163071221065 has 8 divisors (see below), whose sum is σ = 195690957120. Its totient is φ = 130453315632.

The previous prime is 163071221041. The next prime is 163071221069. The reversal of 163071221065 is 560122170361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163071221065 - 2²⁵ = 163037666633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163071221065.

It is not an unprimeable number, because it can be changed into a prime (163071221069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253389 + ... + 624778.

It is an arithmetic number, because the mean of its divisors is an integer number (24461369640).

Almost surely, 2^163071221065 is an apocalyptic number.

It is an amenable number.

163071221065 is a deficient number, since it is larger than the sum of its proper divisors (32619736055).

163071221065 is an equidigital number, since it uses as much as digits as its factorization.

163071221065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915311.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 163071221065 in words is "one hundred sixty-three billion, seventy-one million, two hundred twenty-one thousand, sixty-five".